Speaking in the House of Commons, Labour MP Jess Phillips asked Mrs May to comment on the use of NDAs to "silence" accusers, adding: "It seems that our laws allow rich and powerful men to pretty much do whatever they want as long as they can pay to keep it quiet."

The Prime Minister said she would bring forward consultation measures to improve regulation.

"Non-disclosure agreements cannot stop people from whistleblowing, but it is clear some employers are using them unethically," she said.

Ms Phillips has suggested she would use her parliamentary privilege to name the company boss in the Commons if an accuser came forward to her.